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| Number | Title | Issue Date |
| 7918096 | Refrigeration system In a refrigerant circuit (11), a compressor (20) and an expander (30) are provided separately. An expander casing (34) is connected to a delivery pipe (26) of the compressor (20) and high pressure refrigerant passes through ... | 04/05/2011 |
| 7677051 | Compressor lubrication A system has a compressor having a compression path between a suction port located to receive a working fluid and a discharge port located to discharge the working fluid. The system has means for controlling a flow of at least one of additional working fluid and lub... | 03/16/2010 |
| 7584624 | Apparatus for preventing liquid refrigerant accumulation of air conditioner and method thereof Disclosed is an apparatus and method for preventing liquid refrigerant accumulation in an accumulator of an outdoor unit of an air conditioner. The method includes the steps of: determining a state of a compressor; if the compressor is in standby mode or off state, ... | 09/08/2009 |
| 7349824 | Method and system for evaluating the efficiency of an air conditioning apparatus The applicant describes a system and methods of calculating the overall operating efficiency of an air conditioning chiller that evaluates efficiency of the component parts of the chiller and generates an overall efficiency based on these component efficiency values... | 03/25/2008 |
| 7337630 | Compact evaporator for chiller application An evaporator including a shell having a first end and a second end. A plurality of tubes are disposed within the shell to circulate refrigerant through the shell. A plurality of shell inlets are in fluid communication with the shell to deliver a fluid to exchange h... | 03/04/2008 |
| 7331766 | Compressor In a compressor for gaseous media, in particular, refrigerants, comprising a housing, a drive shaft mounted in the housing, at least one compressor unit arranged in the housing and driven by the drive shaft, and an oil lubricating device for supplying bearing areas ... | 02/19/2008 |
| 7325411 | Compressor loading control A system has a number of parallel flowpath segments between a compressor and an evaporator. One or more valves selectively block and unblock at least one of the segments to provide capacity control. ... | 02/05/2008 |
| 7299648 | Refrigeration system of air conditioning apparatuses with bypass line between inlet and outlet of compressor A refrigeration system of air conditioning apparatuses with a bypass line between the inlet and outlet of a compressor. The refrigeration system (1) has an expansion unit (10) to execute adiabatic expansion of refrigerant, an indoor unit (20) wi... | 11/27/2007 |
| 7299792 | Centrifugal compressor with improved lubrication system for gear-type transmission A centrifugal supercharger includes a case presenting a compressor chamber and a transmission chamber. An impeller in the compressor chamber is mounted to a shaft that extends into the transmission chamber. The impeller shaft is drivingly connected to a power input ... | 11/27/2007 |
| 7287398 | Heating/cooling system for indwelling heat exchange catheter A cooling system for an indwelling heat exchange catheter includes a heat exchange bath that is configured to receive a conduit that carries saline to and from the catheter. A heating/cooling fluid is in the bath and exchanges heat with the saline. The heating/cooli... | 10/30/2007 |
| 7246507 | Air conditioner Provided is an air conditioner which has a separator with an oil tank for storing extra oil; a first oil return tube opening above the surface of the extra oil; and a second oil return tube opening below the surface of the extra oil. When the refrigeration cycle can... | 07/24/2007 |
| 7244095 | Dual pressure Euler steam turbine A turbine, including a rotor on a shaft, and having in combination stationary nozzles discharging steam at a first pressure or pressures thereby producing impulse forces on the rotor; internal passages in the rotor producing a pressure head increase in the discharge... | 07/17/2007 |
| 7231783 | Oil control system for a refrigeration system A refrigeration system includes a compressor having a compressor housing and operable to compress a flow of refrigerant. A pump is operable to provide a flow of oil to the compressor. A portion of the oil mixes with the flow of refrigerant and the remainder of the o... | 06/19/2007 |
| 7225626 | Thermal management of a gas turbine bearing compartment utilizing separate lubrication and cooling circuits A multiple path fluid circuit comprising a fluid reservoir and a fluid pump having an inlet in fluid communication with the fluid reservoir. The fluid pump may have an outlet in fluid communication with an inlet of a fluid cooling circuit. The fluid cooling circuit ... | 06/05/2007 |
| 7222491 | Air conditioner and method for performing oil equalizing operation in the air conditioner An air conditioner including an outdoor unit including a first compressor and a second compressor connected in parallel to the first compressor, an outdoor unit connected in parallel to the outdoor unit, the outdoor unit including a first compressor and a second com... | 05/29/2007 |
| 7219503 | Quick-change coalescent oil separator A refrigeration system including a coalescent oil separator for removing oil from a refrigerant gas and oil mixture discharged from a compressor. Upon a pressure condition being exceeded a directional flow valve opens to allow the refrigerant gas and oil mixture to ... | 05/22/2007 |
| 7204099 | Refrigerant system with vapor injection and liquid injection through separate passages A refrigerant system is provided with economizer vapor injection and liquid injection functions. As is known, the economizer function enhances performance of the refrigerant system. The liquid injection lowers the discharge temperature of the refrigerant to provide ... | 04/17/2007 |
| 7186099 | Inclined scroll machine having a special oil sump A scroll-type compressor is provided in an inclined or inverted position with an oil sump disposed adjacent to a gas inlet of the scroll wraps to allow droplets of oil to be entrained in the gas being compressed so that the oil droplets in the gas can cool the scrol... | 03/06/2007 |
| 7174725 | Compressor, method for manufacturing the compressor, defroster of refrigerant circuit, and refrigeration unit There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engag... | 02/13/2007 |
| 7155367 | Method for evaluating relative efficiency of equipment The current invention is a computer implemented method of evaluating relative efficiency of equipment by constructing a mathematical model of the operation of the equipment, calculating a distance between an actual operating point and the mathematically obtained opt... | 12/26/2006 |
| 7142930 | Disturbance estimated type control system, gas compressor control system and method of designing a disturbance estimated type control system A disturbance estimated-type control system has a control object based on a mathematical model having of one of a state equation and a transfer function and prepared by system identification technology. A disturbance estimating device is based on an expansion system... | 11/28/2006 |
| 7140198 | Air conditioner The present invention is capable of eliminating the line unit in an air conditioner that includes a plurality of heat source units, and hold increases in onsite line construction to a minimum while making it possible to adjust the amount of refrigerant in the air co... | 11/28/2006 |
| 7137265 | Apparatus and method for controlling oil of air conditioner An apparatus and a method for controlling oil of a multi-compressor installed in an air conditioner includes a microcomputer for sequentially stopping compressors installed in the air conditioner for a preset time and then sequentially operating the compressors when... | 11/21/2006 |
| 7134291 | Process for refrigerant charge level detection using a neural net having one output neuron The invention is a process for determining the charge level of a vapor cycle environmental control system, having a condenser, evaporator, and an expansion valve, comprising the steps of providing a neural network having four input neurons, two hidden neurons and on... | 11/14/2006 |
| 7111469 | Process for refrigerant charge level detection using a neural net The invention is a process for determining the charge level of a vapor cycle environmental control system, having a condenser, evaporator, and an expansion valve, comprising the steps of providing a neural network having four input neurons, two hidden neurons and th... | 09/26/2006 |
| 7086240 | Method and apparatus for measuring and improving efficiency in refrigeration systems An apparatus for optimizing an efficiency of a refrigeration system, comprising means for measuring a refrigeration efficiency of an operating refrigeration system: means for altering a process variable of the refrigeration system during efficiency measurement: and ... | 08/08/2006 |
| 7073344 | Electrically controlled defrost and expansion valve apparatus A cooling system that has an electrical controller that controls an electric expansion valve and the defrost cycle using a reversing valve. The need for heater circuit to achieve defrost is eliminated. The system permits the defrosting the evaporator system in less ... | 07/11/2006 |
| 7059143 | Method and apparatus for measuring and improving efficiency in refrigeration systems An apparatus for optimizing an efficiency of a refrigeration system, comprising means for measuring a refrigeration efficiency of an operating refrigeration system; means for altering a process variable of the refrigeration system during efficiency measurement; and ... | 06/13/2006 |
| 7035717 | Method for controlling a thermodynamic process, in particular a combustion process In a method for controlling a thermodynamic process, in particular a combustion process, in which the system status (st) is measured, compared with optimization targets (rj), and in which suitable setting actions (ai) are performed i... | 04/25/2006 |
| 7007503 | Oil equalizing system for multiple compressors An oil equalizing system for multiple compressors which does not require a particular machining process for shells of the compressors, thereby being capable of preventing an increase in costs, while maintaining oil in each compressor in a proper amount. In a refrige... | 03/07/2006 |
| 6999996 | Communication network and method of communicating data on the same A network including a master device and a slave device in communication with the master. The slave includes (n) input terminals adapted to receive a (n)-bit input, and (n) output terminals adapted to communicate a (n)-bit output. The network further includes a proce... | 02/14/2006 |
| 6997001 | Method of operating a refrigeration cycle The object of the present invention is to provide a method of operating a refrigeration cycle which is capable of preventing oil from staying in an evaporator and ensures high coefficient of performance as well as sufficient circulation of oil. An electronic expansi... | 02/14/2006 |
| 6993921 | Multi-variable control of refrigerant systems A control particularly useful for a hot water heating system, includes calculation of a desired leaving water temperature for water leaving a hot water heat exchanger, and a desired refrigerant condition for most efficiently achieving the desired leaving water tempe... | 02/07/2006 |
| 6986259 | Refrigerator Disclosed is a refrigerating apparatus using a temperature sensitive expansion valve (46) as an expansion mechanism. In the refrigerating apparatus, a switching valve (7a) is disposed on the upstream side of an evaporator (45). The switch... | 01/17/2006 |
| 6983793 | Dual evaporator air conditioning system and method of use A dual evaporator air conditioning system and method for use therewith to cool air in front and rear portions of a cabin of a vehicle. The dual evaporator air conditioning system includes primary and auxiliary HVAC units to cool the air in the front and rear portion... | 01/10/2006 |
| 6955059 | Vapor compression system A vapor compression system includes a main vapor compression circuit including a compressor, a condenser, an expansion device and an evaporator serially connected by main refrigerant lines, the compressor having a main discharge port, a suction port and an economize... | 10/18/2005 |
| 6952938 | Purge system and method of use A purge system operable to remove lubricant from a liquid refrigerant material removed from an evaporator of a mechanical refrigeration system. The contaminated liquid refrigerant is delivered to the purge system by gravity and the separated lubricant is returned to... | 10/11/2005 |
| 6948916 | Piping layout for multiple compressor system A multiple hermetic compressor assembly comprising a first compressor and an adjacent, second compressor interconnected by a hot gas pressure discharge manifold, a suction gas pressure equalization manifold, a suction manifold and an oil equalization manifold, the m... | 09/27/2005 |
| 6941767 | Compression mechanism oil equalizing circuit, refrigeration system heat source unit, and refrigeration system provided with the same The present invention provides an oil equalizing circuit that can improve the reliability of the oil supply to the compression mechanisms in a refrigeration system provided with a plurality of compression mechanisms. The compressor group of the air conditioning syst... | 09/13/2005 |
| 6928389 | Compressor performance calculator A system and method for calculating the performance of a compressor wherein the user can select a compressor from a database or retrieve a list of compressors to select from based on application conditions. The system calculates the capacity, power, current, mass fl... | 08/09/2005 |
